张文展,肖和,裘承,邱小林,全才兵,廖丹,周冬兰,刘定荣,陈秋香.8YSZ热障涂层结构设计及其结合强度变化规律[J].表面技术,2023,52(9):469-477.
ZHANG Wen-zhan,XIAO He,QIU Cheng,QIU Xiao-lin,QUAN Cai-bing,LIAO Dan,ZHOU Dong-lan,LIU Ding-rong,CHEN Qiu-xiang.Structural Design and Bonding Strength Variation of 8YSZ Thermal Barrier Coating[J].Surface Technology,2023,52(9):469-477 |
| 8YSZ热障涂层结构设计及其结合强度变化规律 |
| Structural Design and Bonding Strength Variation of 8YSZ Thermal Barrier Coating |
| 投稿时间：2022-08-02 修订日期：2023-02-06 |
| DOI：10.16490/j.cnki.issn.1001-3660.2023.09.043 |
| 中文关键词: 大气等离子喷涂 热障涂层 8YSZ 微观结构 结合强度 断裂位置 |
| 英文关键词:APS thermal barrier coatings 8YSZ microstructure bonding strength fracture location |
| 基金项目:江西省教育厅科学技术项目(GJJ202120) |
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| Author | Institution |
| ZHANG Wen-zhan | Graphene and Advanced Materials Laboratory,Key Laboratory of Jiangxi for Solar Photoelectric Materials Photovoltaic Cell Research Institute School of Electrical and Mechanical Engineering School of Aeronautics and Astronautics, Nanchang Institute of Technology, Nanchang 330044, China |
| XIAO He | Graphene and Advanced Materials Laboratory,Key Laboratory of Jiangxi for Solar Photoelectric Materials Photovoltaic Cell Research Institute School of Electrical and Mechanical Engineering School of Aeronautics and Astronautics, Nanchang Institute of Technology, Nanchang 330044, China |
| QIU Cheng | Graphene and Advanced Materials Laboratory,Key Laboratory of Jiangxi for Solar Photoelectric Materials Photovoltaic Cell Research Institute School of Electrical and Mechanical Engineering School of Aeronautics and Astronautics, Nanchang Institute of Technology, Nanchang 330044, China |
| QIU Xiao-lin | Graphene and Advanced Materials Laboratory,Key Laboratory of Jiangxi for Solar Photoelectric Materials Photovoltaic Cell Research Institute School of Electrical and Mechanical Engineering School of Aeronautics and Astronautics, Nanchang Institute of Technology, Nanchang 330044, China |
| QUAN Cai-bing | Graphene and Advanced Materials Laboratory,Key Laboratory of Jiangxi for Solar Photoelectric Materials Photovoltaic Cell Research Institute School of Electrical and Mechanical Engineering School of Aeronautics and Astronautics, Nanchang Institute of Technology, Nanchang 330044, China |
| LIAO Dan | Graphene and Advanced Materials Laboratory,Key Laboratory of Jiangxi for Solar Photoelectric Materials Photovoltaic Cell Research Institute School of Electrical and Mechanical Engineering School of Aeronautics and Astronautics, Nanchang Institute of Technology, Nanchang 330044, China |
| ZHOU Dong-lan | Graphene and Advanced Materials Laboratory,Key Laboratory of Jiangxi for Solar Photoelectric Materials Photovoltaic Cell Research Institute School of Electrical and Mechanical Engineering School of Aeronautics and Astronautics, Nanchang Institute of Technology, Nanchang 330044, China |
| LIU Ding-rong | Graphene and Advanced Materials Laboratory,Key Laboratory of Jiangxi for Solar Photoelectric Materials Photovoltaic Cell Research Institute School of Electrical and Mechanical Engineering School of Aeronautics and Astronautics, Nanchang Institute of Technology, Nanchang 330044, China |
| CHEN Qiu-xiang | Graphene and Advanced Materials Laboratory,Key Laboratory of Jiangxi for Solar Photoelectric Materials Photovoltaic Cell Research Institute School of Electrical and Mechanical Engineering School of Aeronautics and Astronautics, Nanchang Institute of Technology, Nanchang 330044, China |
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| 中文摘要: |
| 目的 探究不同厚度的黏结层和陶瓷层对8YSZ热障涂层结合强度的变化规律。方法 采用大气等离子喷涂技术(APS)在Ti-6Al-4V合金基体表面分别制备了不同厚度的黏结层和陶瓷层等6种双层结构涂层。利用X射线衍射仪(XRD)、扫描电镜(SEM)和X射线荧光分析仪(XRF)等检测手段对喷涂粉末和涂层的相组成、微观结构及化学成分变化进行表征。借助万能材料试验机分别对6种不同厚度涂层的结合强度进行测量和评估。结果 不同厚度的8YSZ陶瓷粉末在喷涂过程中主要从单斜相(M)向四方相(T)转变。此外，不同厚度的热障涂层都呈现出典型的层状结构，涂层表面存在着完全熔融态、半熔融态和未熔态等3种复杂状态，且都存在不同程度的裂纹和孔隙。涂层结合强度随黏结层厚度的增加会有些许增大，而随陶瓷层厚度的增加逐渐下降，且陶瓷层厚度越大结合强度下降得越缓慢。在所有涂层试样中，当黏结层最厚且陶瓷层最薄时涂层结合强度最大，超过29.7 MPa;而当黏结层最薄陶瓷层最厚时涂层结合强度最低。 结论 8YSZ热障涂层的黏结层和陶瓷层厚度变化对涂层的物相组成以及化学成分无明显影响，而对涂层结合强度以及断裂方式产生显著影响。 |
| 英文摘要: |
| The work aims to explore the effect of different thicknesses of bonding layer and ceramic layer on the bonding strength of 8YSZ thermal barrier coating by designing the structures of bonding layer and ceramic layer. With NiCoCrAlY heat-resistant alloy powder as the metal bonding layer raw material, and nano-agglomerated 8YSZ powder as the ceramic layer raw material, six kinds of double-layer structural coatings with NiCoCrAlY bonding layer thickness of 150 μm and 225 μm, and 8YSZ ceramic layer thickness of 200 μm, 400 μm and 600 μm were prepared on the surface of the Ti-6Al-4V alloy substrate by atmospheric plasma spraying technology. Before the experiments, the Taguchi method was used to find out the optimum process parameters for the coating of the metal bonding layer and the ceramic layer after several experiments. The phase composition, microstructure and chemical composition of sprayed powders and coatings were characterized by X-ray diffractometer (XRD), scanning electron microscope (SEM) and X-ray fluorescence analyzer (XRF). The bonding strength of six coatings with different thicknesses was measured and evaluated with a universal material testing machine. The 8YSZ ceramic powders with different thickness mainly transformed from the monoclinic phase (M) to the tetragonal phase (T) during the spraying process. The chemical composition of the NiCoCrAlY alloy powders and 8YSZ ceramic powders hardly changed before and after spraying process basically. It indicated that the ceramic powder was melted well during the spraying process. Meanwhile, the chemical composition of NiCoCrAlY alloy powder and 8YSZ ceramic powder remained basically unchanged before and after plasma spraying. In addition, thermal barrier coatings with different thickness showed typical layered structures, which included three kinds of complex states:completely molten state, semi-molten state and unmelted state. All these states had cracks and pores to various extents. The bonding strength was positively related to thickness of the bonding layer, and negatively related to thickness of the ceramic layer. Furthermore, as the thickness of the ceramic layer increases, the bonding strength decreases more slowly. Among all the coating samples, when the bonding layer was the thickest and the ceramic layer was the thinnest, the bonding strength of the coating was the largest, over 29.7 MPa. Otherwise, when the bonding layer was the thinnest and the ceramic layer was the thickest, the bonding strength of the coating was the lowest. From the analysis of the morphology and fracture location of the coating after fracture, it was clear that the location of the coating fracture was not related to the thickness of the bonding layer but to the thickness of the ceramic layer. When the thickness of the bonding layer was certain, the location of the coating fracture gradually shifted from between the bonding layer and the fixture to between the ceramic layer and the ceramic layer as the thickness of the ceramic layer increased. All results indicate that the thickness variation of bonding layer and ceramic layer of 8YSZ thermal barrier coatings has no obvious effect on the phase compositions and chemical compositions of the coatings, but have a significant effect on the bonding strength and fracture mode of the coatings. |
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